LeetCode-in-TypeScript
TypeScript-based LeetCode algorithm problem solutions, regularly updated.
- Binary Search II
- Dynamic Programming I
- Programming Skills I
- Programming Skills II
- Graph Theory I
- SQL I
- Level 1
- Level 2
- Udemy
- Data Structure I
- Data Structure II
- Algorithm I
- Algorithm II
- Binary Search I
Binary Search II
Day 1
Day 2
Day 3
0300 | Longest Increasing Subsequence | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Binary_Search, Big_O_Time_O(n*log_n)_Space_O(n) | 57 | 93.75 |
Day 4
Day 5
0287 | Find the Duplicate Number | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Two_Pointers, Bit_Manipulation, Big_O_Time_O(n)_Space_O(n) | 60 | 98.11 |
Day 6
Day 7
Day 8
0240 | Search a 2D Matrix II | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Matrix, Divide_and_Conquer, Big_O_Time_O(n+m)_Space_O(1) | 58 | 64.44 |
Day 9
Day 10
Day 11
Day 12
Day 13
Day 14
Day 15
Day 16
Day 17
Day 18
Day 19
Day 20
Dynamic Programming I
Day 1
Day 2
0070 | Climbing Stairs | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Math, Memoization, Big_O_Time_O(n)_Space_O(n) | 44 | 94.58 |
Day 3
0198 | House Robber | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Big_O_Time_O(n)_Space_O(n) | 51 | 77.29 |
Day 4
0055 | Jump Game | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Greedy, Big_O_Time_O(n)_Space_O(1) | 58 | 91.95 |
0045 | Jump Game II | Medium | Top_100_Liked_Questions, Array, Dynamic_Programming, Greedy, Big_O_Time_O(n)_Space_O(1) | 50 | 95.93 |
Day 5
0053 | Maximum Subarray | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Divide_and_Conquer, Big_O_Time_O(n)_Space_O(1) | 66 | 90.36 |
Day 6
0152 | Maximum Product Subarray | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Big_O_Time_O(N)_Space_O(1) | 53 | 87.50 |
Day 7
0121 | Best Time to Buy and Sell Stock | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Big_O_Time_O(N)_Space_O(1) | 56 | 99.56 |
Day 8
Day 9
0139 | Word Break | Medium | Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Dynamic_Programming, Trie, Memoization, Big_O_Time_O(M+max*N)_Space_O(M+N+max) | 56 | 88.44 |
0042 | Trapping Rain Water | Hard | Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Two_Pointers, Stack, Monotonic_Stack, Big_O_Time_O(n)_Space_O(1) | 46 | 99.52 |
Day 10
Day 11
0096 | Unique Binary Search Trees | Medium | Top_100_Liked_Questions, Dynamic_Programming, Math, Tree, Binary_Tree, Binary_Search_Tree, Big_O_Time_O(n)_Space_O(1) | 45 | 96.00 |
Day 12
Day 13
Day 14
Day 15
0062 | Unique Paths | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Math, Combinatorics, Big_O_Time_O(m*n)_Space_O(m*n) | 40 | 98.97 |
Day 16
0064 | Minimum Path Sum | Medium | Top_100_Liked_Questions, Array, Dynamic_Programming, Matrix, Big_O_Time_O(m*n)_Space_O(m*n) | 48 | 99.67 |
0221 | Maximal Square | Medium | Top_100_Liked_Questions, Array, Dynamic_Programming, Matrix, Big_O_Time_O(m*n)_Space_O(m*n) | 83 | 79.70 |
Day 17
0005 | Longest Palindromic Substring | Medium | Top_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Big_O_Time_O(n)_Space_O(n) | 68 | 95.34 |
Day 18
0300 | Longest Increasing Subsequence | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Binary_Search, Big_O_Time_O(n*log_n)_Space_O(n) | 57 | 93.75 |
Day 19
1143 | Longest Common Subsequence | Medium | Top_100_Liked_Questions, String, Dynamic_Programming, Big_O_Time_O(n*m)_Space_O(n*m) | 94 | 80.56 |
0072 | Edit Distance | Hard | Top_100_Liked_Questions, String, Dynamic_Programming, Big_O_Time_O(n^2)_Space_O(n2) | 68 | 95.20 |
Day 20
0322 | Coin Change | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Breadth_First_Search, Big_O_Time_O(m*n)_Space_O(amount) | 85 | 86.14 |
Day 21
Programming Skills I
Day 1 Basic Data Type
Day 2 Operator
Day 3 Conditional Statements
Day 4 Loop
Day 5 Function
Day 6 Array
0283 | Move Zeroes | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Array, Two_Pointers, Big_O_Time_O(n)_Space_O(1) | 71 | 91.63 |
Day 7 Array
Day 8 String
Day 9 String
Day 10 Linked List and Tree
0104 | Maximum Depth of Binary Tree | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Big_O_Time_O(N)_Space_O(H) | 51 | 97.14 |
Day 11 Containers and Libraries
Day 12 Class and Object
Programming Skills II
Day 1
Day 2
Day 3
Day 4
Day 5
Day 6
0739 | Daily Temperatures | Medium | Top_100_Liked_Questions, Array, Stack, Monotonic_Stack, Big_O_Time_O(n)_Space_O(n) | 194 | 97.36 |
Day 7
0048 | Rotate Image | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Math, Matrix, Big_O_Time_O(n^2)_Space_O(1) | 45 | 95.31 |
Day 8
Day 9
Day 10
Day 11
0049 | Group Anagrams | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, String, Hash_Table, Sorting, Big_O_Time_O(n*k_log_k)_Space_O(n) | 93 | 97.29 |
Day 12
0438 | Find All Anagrams in a String | Medium | Top_100_Liked_Questions, String, Hash_Table, Sliding_Window, Big_O_Time_O(n+m)_Space_O(1) | 69 | 96.69 |
Day 13
Day 14
0138 | Copy List with Random Pointer | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Hash_Table, Linked_List, Big_O_Time_O(N)_Space_O(N) | 52 | 88.27 |
Day 15
0002 | Add Two Numbers | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Math, Linked_List, Recursion, Big_O_Time_O(max(N,M))_Space_O(max(N,M)) | 92 | 77.86 |
Day 16
Day 17
Day 18
0155 | Min Stack | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Stack, Design, Big_O_Time_O(1)_Space_O(N) | 84 | 92.72 |
Day 19
Day 20
Graph Theory I
Day 1 Matrix Related Problems
0200 | Number of Islands | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Depth_First_Search, Breadth_First_Search, Matrix, Union_Find, Big_O_Time_O(M*N)_Space_O(M*N) | 61 | 96.71 |
Day 2 Matrix Related Problems
Day 3 Matrix Related Problems
Day 4 Matrix Related Problems
Day 5 Matrix Related Problems
Day 6 Matrix Related Problems
Day 7 Standard Traversal
Day 8 Standard Traversal
Day 9 Standard Traversal
Day 10 Standard Traversal
Day 11 Breadth First Search
Day 12 Breadth First Search
Day 13 Graph Theory
Day 14 Graph Theory
SQL I
Day 1 Select
Day 2 Select and Order
Day 3 String Processing Functions
Day 4 Union and Select
Day 5 Union
Day 6 Union
Day 7 Function
Day 8 Function
Day 9 Control of Flow
Day 10 Where
Level 1
Day 1 Prefix Sum
Day 2 String
Day 3 Linked List
0021 | Merge Two Sorted Lists | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Linked_List, Recursion, Big_O_Time_O(m+n)_Space_O(m+n) | 59 | 86.77 |
0206 | Reverse Linked List | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Linked_List, Recursion, Big_O_Time_O(N)_Space_O(1) | 51 | 92.87 |
Day 4 Linked List
0142 | Linked List Cycle II | Medium | Top_100_Liked_Questions, Hash_Table, Two_Pointers, Linked_List, Big_O_Time_O(N)_Space_O(1) | 59 | 94.39 |
Day 5 Greedy
0121 | Best Time to Buy and Sell Stock | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Big_O_Time_O(N)_Space_O(1) | 56 | 99.56 |
Day 6 Tree
0102 | Binary Tree Level Order Traversal | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Breadth_First_Search, Tree, Binary_Tree, Big_O_Time_O(N)_Space_O(N) | 60 | 97.47 |
Day 7 Binary Search
Day 8 Binary Search Tree
0098 | Validate Binary Search Tree | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Tree, Binary_Tree, Binary_Search_Tree, Big_O_Time_O(N)_Space_O(log(N)) | 51 | 98.35 |
Day 9 Graph/BFS/DFS
0200 | Number of Islands | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Depth_First_Search, Breadth_First_Search, Matrix, Union_Find, Big_O_Time_O(M*N)_Space_O(M*N) | 61 | 96.71 |
Day 10 Dynamic Programming
0070 | Climbing Stairs | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Math, Memoization, Big_O_Time_O(n)_Space_O(n) | 44 | 94.58 |
Day 11 Dynamic Programming
0062 | Unique Paths | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Math, Combinatorics, Big_O_Time_O(m*n)_Space_O(m*n) | 40 | 98.97 |
Day 12 Sliding Window/Two Pointer
0438 | Find All Anagrams in a String | Medium | Top_100_Liked_Questions, String, Hash_Table, Sliding_Window, Big_O_Time_O(n+m)_Space_O(1) | 69 | 96.69 |
Day 13 Hashmap
0001 | Two Sum | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Big_O_Time_O(n)_Space_O(n) | 54 | 91.72 |
Day 14 Stack
0394 | Decode String | Medium | Top_100_Liked_Questions, String, Stack, Recursion, Big_O_Time_O(n)_Space_O(n) | 51 | 81.02 |
Day 15 Heap
Level 2
Day 1 Implementation/Simulation
Day 2 String
Day 3 Linked List
0019 | Remove Nth Node From End of List | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Two_Pointers, Linked_List, Big_O_Time_O(L)_Space_O(L) | 54 | 87.87 |
0234 | Palindrome Linked List | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Two_Pointers, Stack, Linked_List, Recursion, Big_O_Time_O(n)_Space_O(1) | 96 | 95.67 |
Day 4 Linked List
0148 | Sort List | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Sorting, Two_Pointers, Linked_List, Divide_and_Conquer, Merge_Sort, Big_O_Time_O(log(N))_Space_O(log(N)) | 141 | 97.14 |
Day 5 Greedy
Day 6 Tree
0226 | Invert Binary Tree | Easy | Top_100_Liked_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Big_O_Time_O(n)_Space_O(n) | 52 | 81.65 |
Day 7 Tree
0543 | Diameter of Binary Tree | Easy | Top_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, Big_O_Time_O(n)_Space_O(n) | 61 | 80.89 |
0437 | Path Sum III | Medium | Top_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, Big_O_Time_O(n)_Space_O(n) | 68 | 86.71 |
Day 8 Binary Search
0074 | Search a 2D Matrix | Medium | Top_100_Liked_Questions, Array, Binary_Search, Matrix, Big_O_Time_O(endRow+endCol)_Space_O(1) | 45 | 96.82 |
0033 | Search in Rotated Sorted Array | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Big_O_Time_O(log_n)_Space_O(1) | 43 | 98.54 |
Day 9 Binary Search Tree
0230 | Kth Smallest Element in a BST | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Tree, Binary_Tree, Binary_Search_Tree, Big_O_Time_O(n)_Space_O(n) | 54 | 97.22 |
Day 10 Graph/BFS/DFS
Day 11 Graph/BFS/DFS
Day 12 Dynamic Programming
0198 | House Robber | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Big_O_Time_O(n)_Space_O(n) | 51 | 77.29 |
0322 | Coin Change | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Breadth_First_Search, Big_O_Time_O(m*n)_Space_O(amount) | 85 | 86.14 |
Day 13 Dynamic Programming
0416 | Partition Equal Subset Sum | Medium | Top_100_Liked_Questions, Array, Dynamic_Programming, Big_O_Time_O(n*sums)_Space_O(n*sums) | 91 | 74.38 |
0152 | Maximum Product Subarray | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Big_O_Time_O(N)_Space_O(1) | 53 | 87.50 |
Day 14 Sliding Window/Two Pointer
0003 | Longest Substring Without Repeating Characters | Medium | Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Sliding_Window, Big_O_Time_O(n)_Space_O(1) | 65 | 90.77 |
0076 | Minimum Window Substring | Hard | Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Sliding_Window, Big_O_Time_O(s.length())_Space_O(1) | 82 | 82.17 |
Day 15 Tree
0101 | Symmetric Tree | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Big_O_Time_O(N)_Space_O(log(N)) | 49 | 98.54 |
Day 16 Design
0155 | Min Stack | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Stack, Design, Big_O_Time_O(1)_Space_O(N) | 84 | 92.72 |
0208 | Implement Trie (Prefix Tree) | Medium | Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Design, Trie, Big_O_Time_O(word.length())_or_O(prefix.length())_Space_O(N) | 168 | 80.99 |
Day 17 Interval
0056 | Merge Intervals | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Big_O_Time_O(n_log_n)_Space_O(n) | 84 | 92.06 |
Day 18 Stack
Day 19 Union Find
Day 20 Brute Force/Backtracking
0039 | Combination Sum | Medium | Top_100_Liked_Questions, Array, Backtracking, Big_O_Time_O(2^n)_Space_O(n+2^n) | 65 | 86.86 |
0046 | Permutations | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Backtracking, Big_O_Time_O(n*n!)_Space_O(n+n!) | 56 | 96.26 |
Udemy
Udemy Integers
0136 | Single Number | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Array, Bit_Manipulation, Big_O_Time_O(N)_Space_O(1) | 56 | 85.48 |
0007 | Reverse Integer | Medium | Top_Interview_Questions, Math | 56 | 95.68 |
0009 | Palindrome Number | Easy | Math | 137 | 88.64 |
Udemy Strings
0003 | Longest Substring Without Repeating Characters | Medium | Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Sliding_Window, Big_O_Time_O(n)_Space_O(1) | 65 | 90.77 |
0020 | Valid Parentheses | Easy | Top_100_Liked_Questions, Top_Interview_Questions, String, Stack, Big_O_Time_O(n)_Space_O(n) | 50 | 95.90 |
0005 | Longest Palindromic Substring | Medium | Top_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Big_O_Time_O(n)_Space_O(n) | 68 | 95.34 |
0394 | Decode String | Medium | Top_100_Liked_Questions, String, Stack, Recursion, Big_O_Time_O(n)_Space_O(n) | 51 | 81.02 |
0049 | Group Anagrams | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, String, Hash_Table, Sorting, Big_O_Time_O(n*k_log_k)_Space_O(n) | 93 | 97.29 |
Udemy Binary Search
0033 | Search in Rotated Sorted Array | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Big_O_Time_O(log_n)_Space_O(1) | 43 | 98.54 |
0153 | Find Minimum in Rotated Sorted Array | Medium | Top_100_Liked_Questions, Array, Binary_Search, Big_O_Time_O(log_N)_Space_O(log_N) | 42 | 98.87 |
Udemy Arrays
0121 | Best Time to Buy and Sell Stock | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Big_O_Time_O(N)_Space_O(1) | 56 | 99.56 |
0283 | Move Zeroes | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Array, Two_Pointers, Big_O_Time_O(n)_Space_O(1) | 71 | 91.63 |
0001 | Two Sum | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Big_O_Time_O(n)_Space_O(n) | 54 | 91.72 |
0189 | Rotate Array | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Math, Two_Pointers, Big_O_Time_O(n)_Space_O(1) | 75 | 97.25 |
0055 | Jump Game | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Greedy, Big_O_Time_O(n)_Space_O(1) | 58 | 91.95 |
0075 | Sort Colors | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Two_Pointers, Big_O_Time_O(n)_Space_O(1) | 43 | 97.41 |
0238 | Product of Array Except Self | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Prefix_Sum, Big_O_Time_O(n^2)_Space_O(n) | 89 | 64.48 |
0041 | First Missing Positive | Hard | Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Big_O_Time_O(n)_Space_O(n) | 55 | 98.51 |
0239 | Sliding Window Maximum | Hard | Top_100_Liked_Questions, Top_Interview_Questions, Array, Heap_Priority_Queue, Sliding_Window, Queue, Monotonic_Queue, Big_O_Time_O(n*k)_Space_O(n+k) | 216 | 99.50 |
Udemy Two Pointers
0042 | Trapping Rain Water | Hard | Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Two_Pointers, Stack, Monotonic_Stack, Big_O_Time_O(n)_Space_O(1) | 46 | 99.52 |
0015 | 3Sum | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Two_Pointers, Big_O_Time_O(n*log(n))_Space_O(n^2) | 148 | 92.62 |
Udemy Famous Algorithm
0053 | Maximum Subarray | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Divide_and_Conquer, Big_O_Time_O(n)_Space_O(1) | 66 | 90.36 |
0169 | Majority Element | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Sorting, Counting, Divide_and_Conquer, Big_O_Time_O(n)_Space_O(1) | 50 | 96.16 |
Udemy Sorting Algorithms
Udemy 2D Arrays/Matrix
0074 | Search a 2D Matrix | Medium | Top_100_Liked_Questions, Array, Binary_Search, Matrix, Big_O_Time_O(endRow+endCol)_Space_O(1) | 45 | 96.82 |
0048 | Rotate Image | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Math, Matrix, Big_O_Time_O(n^2)_Space_O(1) | 45 | 95.31 |
0073 | Set Matrix Zeroes | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Matrix, Big_O_Time_O(m*n)_Space_O(1) | 61 | 97.66 |
0056 | Merge Intervals | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Big_O_Time_O(n_log_n)_Space_O(n) | 84 | 92.06 |
Udemy Linked List
0114 | Flatten Binary Tree to Linked List | Medium | Top_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, Stack, Linked_List, Big_O_Time_O(N)_Space_O(N) | 55 | 90.66 |
0024 | Swap Nodes in Pairs | Medium | Top_100_Liked_Questions, Linked_List, Recursion, Big_O_Time_O(n)_Space_O(1) | 59 | 62.67 |
0142 | Linked List Cycle II | Medium | Top_100_Liked_Questions, Hash_Table, Two_Pointers, Linked_List, Big_O_Time_O(N)_Space_O(1) | 59 | 94.39 |
0141 | Linked List Cycle | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Hash_Table, Two_Pointers, Linked_List, Big_O_Time_O(N)_Space_O(1) | 59 | 93.37 |
0206 | Reverse Linked List | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Linked_List, Recursion, Big_O_Time_O(N)_Space_O(1) | 51 | 92.87 |
0021 | Merge Two Sorted Lists | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Linked_List, Recursion, Big_O_Time_O(m+n)_Space_O(m+n) | 59 | 86.77 |
0160 | Intersection of Two Linked Lists | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Hash_Table, Two_Pointers, Linked_List, Big_O_Time_O(M+N)_Space_O(1) | 67 | 93.58 |
0234 | Palindrome Linked List | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Two_Pointers, Stack, Linked_List, Recursion, Big_O_Time_O(n)_Space_O(1) | 96 | 95.67 |
0138 | Copy List with Random Pointer | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Hash_Table, Linked_List, Big_O_Time_O(N)_Space_O(N) | 52 | 88.27 |
0025 | Reverse Nodes in k-Group | Hard | Top_100_Liked_Questions, Linked_List, Recursion, Big_O_Time_O(n)_Space_O(k) | 74 | 66.83 |
0146 | LRU Cache | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Hash_Table, Design, Linked_List, Doubly_Linked_List, Big_O_Time_O(1)_Space_O(capacity) | 473 | 94.72 |
Udemy Tree Stack Queue
0094 | Binary Tree Inorder Traversal | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Tree, Binary_Tree, Stack, Big_O_Time_O(n)_Space_O(n) | 45 | 97.30 |
0102 | Binary Tree Level Order Traversal | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Breadth_First_Search, Tree, Binary_Tree, Big_O_Time_O(N)_Space_O(N) | 60 | 97.47 |
0543 | Diameter of Binary Tree | Easy | Top_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, Big_O_Time_O(n)_Space_O(n) | 61 | 80.89 |
0226 | Invert Binary Tree | Easy | Top_100_Liked_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Big_O_Time_O(n)_Space_O(n) | 52 | 81.65 |
0104 | Maximum Depth of Binary Tree | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Big_O_Time_O(N)_Space_O(H) | 51 | 97.14 |
0124 | Binary Tree Maximum Path Sum | Hard | Top_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Depth_First_Search, Tree, Binary_Tree, Big_O_Time_O(N)_Space_O(N) | 61 | 96.73 |
0098 | Validate Binary Search Tree | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Tree, Binary_Tree, Binary_Search_Tree, Big_O_Time_O(N)_Space_O(log(N)) | 51 | 98.35 |
0236 | Lowest Common Ancestor of a Binary Tree | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Tree, Binary_Tree, Big_O_Time_O(n)_Space_O(n) | 59 | 96.11 |
Udemy Trie and Heap
0208 | Implement Trie (Prefix Tree) | Medium | Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Design, Trie, Big_O_Time_O(word.length())_or_O(prefix.length())_Space_O(N) | 168 | 80.99 |
Udemy Graph
0200 | Number of Islands | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Depth_First_Search, Breadth_First_Search, Matrix, Union_Find, Big_O_Time_O(M*N)_Space_O(M*N) | 61 | 96.71 |
Udemy Dynamic Programming
0139 | Word Break | Medium | Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Dynamic_Programming, Trie, Memoization, Big_O_Time_O(M+max*N)_Space_O(M+N+max) | 56 | 88.44 |
0152 | Maximum Product Subarray | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Big_O_Time_O(N)_Space_O(1) | 53 | 87.50 |
0198 | House Robber | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Big_O_Time_O(n)_Space_O(n) | 51 | 77.29 |
0070 | Climbing Stairs | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Math, Memoization, Big_O_Time_O(n)_Space_O(n) | 44 | 94.58 |
0064 | Minimum Path Sum | Medium | Top_100_Liked_Questions, Array, Dynamic_Programming, Matrix, Big_O_Time_O(m*n)_Space_O(m*n) | 48 | 99.67 |
0300 | Longest Increasing Subsequence | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Binary_Search, Big_O_Time_O(n*log_n)_Space_O(n) | 57 | 93.75 |
1143 | Longest Common Subsequence | Medium | Top_100_Liked_Questions, String, Dynamic_Programming, Big_O_Time_O(n*m)_Space_O(n*m) | 94 | 80.56 |
0072 | Edit Distance | Hard | Top_100_Liked_Questions, String, Dynamic_Programming, Big_O_Time_O(n^2)_Space_O(n2) | 68 | 95.20 |
0010 | Regular Expression Matching | Hard | Top_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Recursion, Big_O_Time_O(m*n)_Space_O(m*n) | 69 | 92.65 |
Udemy Backtracking/Recursion
0022 | Generate Parentheses | Medium | Top_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Backtracking, Big_O_Time_O(2^n)_Space_O(n) | 60 | 62.03 |
0039 | Combination Sum | Medium | Top_100_Liked_Questions, Array, Backtracking, Big_O_Time_O(2^n)_Space_O(n+2^n) | 65 | 86.86 |
0078 | Subsets | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Bit_Manipulation, Backtracking, Big_O_Time_O(2^n)_Space_O(n*2^n) | 50 | 94.61 |
0017 | Letter Combinations of a Phone Number | Medium | Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Backtracking, Big_O_Time_O(4^n)_Space_O(n) | 52 | 79.11 |
0046 | Permutations | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Backtracking, Big_O_Time_O(n*n!)_Space_O(n+n!) | 56 | 96.26 |
Udemy Bit Manipulation
0338 | Counting Bits | Easy | Top_100_Liked_Questions, Dynamic_Programming, Bit_Manipulation, Big_O_Time_O(num)_Space_O(num) | 69 | 86.81 |
Udemy Design
0155 | Min Stack | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Stack, Design, Big_O_Time_O(1)_Space_O(N) | 84 | 92.72 |
Data Structure I
Day 1 Array
0053 | Maximum Subarray | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Divide_and_Conquer, Big_O_Time_O(n)_Space_O(1) | 66 | 90.36 |
Day 2 Array
0001 | Two Sum | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Big_O_Time_O(n)_Space_O(n) | 54 | 91.72 |
Day 3 Array
0121 | Best Time to Buy and Sell Stock | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Big_O_Time_O(N)_Space_O(1) | 56 | 99.56 |
Day 4 Array
Day 5 Array
0074 | Search a 2D Matrix | Medium | Top_100_Liked_Questions, Array, Binary_Search, Matrix, Big_O_Time_O(endRow+endCol)_Space_O(1) | 45 | 96.82 |
Day 6 String
Day 7 Linked List
0141 | Linked List Cycle | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Hash_Table, Two_Pointers, Linked_List, Big_O_Time_O(N)_Space_O(1) | 59 | 93.37 |
0021 | Merge Two Sorted Lists | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Linked_List, Recursion, Big_O_Time_O(m+n)_Space_O(m+n) | 59 | 86.77 |
Day 8 Linked List
0206 | Reverse Linked List | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Linked_List, Recursion, Big_O_Time_O(N)_Space_O(1) | 51 | 92.87 |
Day 9 Stack Queue
0020 | Valid Parentheses | Easy | Top_100_Liked_Questions, Top_Interview_Questions, String, Stack, Big_O_Time_O(n)_Space_O(n) | 50 | 95.90 |
Day 10 Tree
0094 | Binary Tree Inorder Traversal | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Tree, Binary_Tree, Stack, Big_O_Time_O(n)_Space_O(n) | 45 | 97.30 |
Day 11 Tree
0102 | Binary Tree Level Order Traversal | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Breadth_First_Search, Tree, Binary_Tree, Big_O_Time_O(N)_Space_O(N) | 60 | 97.47 |
0104 | Maximum Depth of Binary Tree | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Big_O_Time_O(N)_Space_O(H) | 51 | 97.14 |
0101 | Symmetric Tree | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Big_O_Time_O(N)_Space_O(log(N)) | 49 | 98.54 |
Day 12 Tree
0226 | Invert Binary Tree | Easy | Top_100_Liked_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Big_O_Time_O(n)_Space_O(n) | 52 | 81.65 |
Day 13 Tree
Day 14 Tree
0098 | Validate Binary Search Tree | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Tree, Binary_Tree, Binary_Search_Tree, Big_O_Time_O(N)_Space_O(log(N)) | 51 | 98.35 |
Data Structure II
Day 1 Array
0136 | Single Number | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Array, Bit_Manipulation, Big_O_Time_O(N)_Space_O(1) | 56 | 85.48 |
0169 | Majority Element | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Sorting, Counting, Divide_and_Conquer, Big_O_Time_O(n)_Space_O(1) | 50 | 96.16 |
0015 | 3Sum | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Two_Pointers, Big_O_Time_O(n*log(n))_Space_O(n^2) | 148 | 92.62 |
Day 2 Array
0075 | Sort Colors | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Two_Pointers, Big_O_Time_O(n)_Space_O(1) | 43 | 97.41 |
0056 | Merge Intervals | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Big_O_Time_O(n_log_n)_Space_O(n) | 84 | 92.06 |
Day 3 Array
0048 | Rotate Image | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Math, Matrix, Big_O_Time_O(n^2)_Space_O(1) | 45 | 95.31 |
Day 4 Array
0240 | Search a 2D Matrix II | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Matrix, Divide_and_Conquer, Big_O_Time_O(n+m)_Space_O(1) | 58 | 64.44 |
Day 5 Array
0238 | Product of Array Except Self | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Prefix_Sum, Big_O_Time_O(n^2)_Space_O(n) | 89 | 64.48 |
0560 | Subarray Sum Equals K | Medium | Top_100_Liked_Questions, Array, Hash_Table, Prefix_Sum, Big_O_Time_O(n)_Space_O(n) | 70 | 92.45 |
Day 6 String
Day 7 String
0763 | Partition Labels | Medium | Top_100_Liked_Questions, String, Hash_Table, Greedy, Two_Pointers, Big_O_Time_O(n)_Space_O(1) | 54 | 94.74 |
Day 8 String
0049 | Group Anagrams | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, String, Hash_Table, Sorting, Big_O_Time_O(n*k_log_k)_Space_O(n) | 93 | 97.29 |
Day 9 String
0005 | Longest Palindromic Substring | Medium | Top_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Big_O_Time_O(n)_Space_O(n) | 68 | 95.34 |
Day 10 Linked List
0002 | Add Two Numbers | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Math, Linked_List, Recursion, Big_O_Time_O(max(N,M))_Space_O(max(N,M)) | 92 | 77.86 |
0142 | Linked List Cycle II | Medium | Top_100_Liked_Questions, Hash_Table, Two_Pointers, Linked_List, Big_O_Time_O(N)_Space_O(1) | 59 | 94.39 |
Day 11 Linked List
0160 | Intersection of Two Linked Lists | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Hash_Table, Two_Pointers, Linked_List, Big_O_Time_O(M+N)_Space_O(1) | 67 | 93.58 |
Day 12 Linked List
0024 | Swap Nodes in Pairs | Medium | Top_100_Liked_Questions, Linked_List, Recursion, Big_O_Time_O(n)_Space_O(1) | 59 | 62.67 |
Day 13 Linked List
0025 | Reverse Nodes in k-Group | Hard | Top_100_Liked_Questions, Linked_List, Recursion, Big_O_Time_O(n)_Space_O(k) | 74 | 66.83 |
Day 14 Stack Queue
0155 | Min Stack | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Stack, Design, Big_O_Time_O(1)_Space_O(N) | 84 | 92.72 |
Day 15 Tree
0105 | Construct Binary Tree from Preorder and Inorder Traversal | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Tree, Binary_Tree, Divide_and_Conquer, Big_O_Time_O(N)_Space_O(N) | 65 | 96.47 |
Day 16 Tree
Day 17 Tree
0230 | Kth Smallest Element in a BST | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Tree, Binary_Tree, Binary_Search_Tree, Big_O_Time_O(n)_Space_O(n) | 54 | 97.22 |
Day 18 Tree
0236 | Lowest Common Ancestor of a Binary Tree | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Tree, Binary_Tree, Big_O_Time_O(n)_Space_O(n) | 59 | 96.11 |
Day 19 Graph
Day 20 Heap Priority Queue
0215 | Kth Largest Element in an Array | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Heap_Priority_Queue, Divide_and_Conquer, Quickselect, Big_O_Time_O(n*log(n))_Space_O(log(n)) | 148 | 54.45 |
0347 | Top K Frequent Elements | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Sorting, Heap_Priority_Queue, Counting, Divide_and_Conquer, Quickselect, Bucket_Sort, Big_O_Time_O(n*log(n))_Space_O(k) | 62 | 87.48 |
Day 21 Heap Priority Queue
Algorithm I
Day 1 Binary Search
0035 | Search Insert Position | Easy | Top_100_Liked_Questions, Array, Binary_Search, Big_O_Time_O(log_n)_Space_O(1) | 51 | 80.95 |
Day 2 Two Pointers
0189 | Rotate Array | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Math, Two_Pointers, Big_O_Time_O(n)_Space_O(1) | 75 | 97.25 |
Day 3 Two Pointers
0283 | Move Zeroes | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Array, Two_Pointers, Big_O_Time_O(n)_Space_O(1) | 71 | 91.63 |
Day 4 Two Pointers
Day 5 Two Pointers
0019 | Remove Nth Node From End of List | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Two_Pointers, Linked_List, Big_O_Time_O(L)_Space_O(L) | 54 | 87.87 |
Day 6 Sliding Window
0003 | Longest Substring Without Repeating Characters | Medium | Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Sliding_Window, Big_O_Time_O(n)_Space_O(1) | 65 | 90.77 |
Day 7 Breadth First Search Depth First Search
Day 8 Breadth First Search Depth First Search
Day 9 Breadth First Search Depth First Search
Day 10 Recursion Backtracking
0021 | Merge Two Sorted Lists | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Linked_List, Recursion, Big_O_Time_O(m+n)_Space_O(m+n) | 59 | 86.77 |
0206 | Reverse Linked List | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Linked_List, Recursion, Big_O_Time_O(N)_Space_O(1) | 51 | 92.87 |
Day 11 Recursion Backtracking
0046 | Permutations | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Backtracking, Big_O_Time_O(n*n!)_Space_O(n+n!) | 56 | 96.26 |
Day 12 Dynamic Programming
0070 | Climbing Stairs | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Math, Memoization, Big_O_Time_O(n)_Space_O(n) | 44 | 94.58 |
0198 | House Robber | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Big_O_Time_O(n)_Space_O(n) | 51 | 77.29 |
Day 13 Bit Manipulation
Day 14 Bit Manipulation
0136 | Single Number | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Array, Bit_Manipulation, Big_O_Time_O(N)_Space_O(1) | 56 | 85.48 |
Algorithm II
Day 1 Binary Search
0034 | Find First and Last Position of Element in Sorted Array | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Big_O_Time_O(log_n)_Space_O(1) | 45 | 98.05 |
0033 | Search in Rotated Sorted Array | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Big_O_Time_O(log_n)_Space_O(1) | 43 | 98.54 |
0074 | Search a 2D Matrix | Medium | Top_100_Liked_Questions, Array, Binary_Search, Matrix, Big_O_Time_O(endRow+endCol)_Space_O(1) | 45 | 96.82 |
Day 2 Binary Search
0153 | Find Minimum in Rotated Sorted Array | Medium | Top_100_Liked_Questions, Array, Binary_Search, Big_O_Time_O(log_N)_Space_O(log_N) | 42 | 98.87 |
Day 3 Two Pointers
0015 | 3Sum | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Two_Pointers, Big_O_Time_O(n*log(n))_Space_O(n^2) | 148 | 92.62 |
Day 4 Two Pointers
0011 | Container With Most Water | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Greedy, Two_Pointers, Big_O_Time_O(n)_Space_O(1) | 57 | 98.23 |
Day 5 Sliding Window
0438 | Find All Anagrams in a String | Medium | Top_100_Liked_Questions, String, Hash_Table, Sliding_Window, Big_O_Time_O(n+m)_Space_O(1) | 69 | 96.69 |
Day 6 Breadth First Search Depth First Search
0200 | Number of Islands | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Depth_First_Search, Breadth_First_Search, Matrix, Union_Find, Big_O_Time_O(M*N)_Space_O(M*N) | 61 | 96.71 |
Day 7 Breadth First Search Depth First Search
Day 8 Breadth First Search Depth First Search
Day 9 Recursion Backtracking
0078 | Subsets | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Bit_Manipulation, Backtracking, Big_O_Time_O(2^n)_Space_O(n*2^n) | 50 | 94.61 |
Day 10 Recursion Backtracking
0039 | Combination Sum | Medium | Top_100_Liked_Questions, Array, Backtracking, Big_O_Time_O(2^n)_Space_O(n+2^n) | 65 | 86.86 |
Day 11 Recursion Backtracking
0017 | Letter Combinations of a Phone Number | Medium | Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Backtracking, Big_O_Time_O(4^n)_Space_O(n) | 52 | 79.11 |
0022 | Generate Parentheses | Medium | Top_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Backtracking, Big_O_Time_O(2^n)_Space_O(n) | 60 | 62.03 |
0079 | Word Search | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Matrix, Backtracking, Big_O_Time_O(4^(m*n))_Space_O(m*n) | 327 | 95.78 |
Day 12 Dynamic Programming
0055 | Jump Game | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Greedy, Big_O_Time_O(n)_Space_O(1) | 58 | 91.95 |
Day 13 Dynamic Programming
0045 | Jump Game II | Medium | Top_100_Liked_Questions, Array, Dynamic_Programming, Greedy, Big_O_Time_O(n)_Space_O(1) | 50 | 95.93 |
0062 | Unique Paths | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Math, Combinatorics, Big_O_Time_O(m*n)_Space_O(m*n) | 40 | 98.97 |
Day 14 Dynamic Programming
0005 | Longest Palindromic Substring | Medium | Top_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Big_O_Time_O(n)_Space_O(n) | 68 | 95.34 |
Day 15 Dynamic Programming
0139 | Word Break | Medium | Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Dynamic_Programming, Trie, Memoization, Big_O_Time_O(M+max*N)_Space_O(M+N+max) | 56 | 88.44 |
Day 16 Dynamic Programming
0300 | Longest Increasing Subsequence | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Binary_Search, Big_O_Time_O(n*log_n)_Space_O(n) | 57 | 93.75 |
Day 17 Dynamic Programming
1143 | Longest Common Subsequence | Medium | Top_100_Liked_Questions, String, Dynamic_Programming, Big_O_Time_O(n*m)_Space_O(n*m) | 94 | 80.56 |
Day 18 Dynamic Programming
0072 | Edit Distance | Hard | Top_100_Liked_Questions, String, Dynamic_Programming, Big_O_Time_O(n^2)_Space_O(n2) | 68 | 95.20 |
0322 | Coin Change | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Breadth_First_Search, Big_O_Time_O(m*n)_Space_O(amount) | 85 | 86.14 |
Day 19 Bit Manipulation
Day 20 Others
Day 21 Others
Binary Search I
Day 1
Day 2
0035 | Search Insert Position | Easy | Top_100_Liked_Questions, Array, Binary_Search, Big_O_Time_O(log_n)_Space_O(1) | 51 | 80.95 |
Day 3
Day 4
Day 5
0034 | Find First and Last Position of Element in Sorted Array | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Big_O_Time_O(log_n)_Space_O(1) | 45 | 98.05 |
Day 6
Day 7
Day 8
0074 | Search a 2D Matrix | Medium | Top_100_Liked_Questions, Array, Binary_Search, Matrix, Big_O_Time_O(endRow+endCol)_Space_O(1) | 45 | 96.82 |
Day 9
Day 10
Day 11
0033 | Search in Rotated Sorted Array | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Big_O_Time_O(log_n)_Space_O(1) | 43 | 98.54 |
Day 12
0153 | Find Minimum in Rotated Sorted Array | Medium | Top_100_Liked_Questions, Array, Binary_Search, Big_O_Time_O(log_N)_Space_O(log_N) | 42 | 98.87 |
Algorithms
# | Title | Difficulty | Tag | Time, ms | Time, % |
---|---|---|---|---|---|
1143 | Longest Common Subsequence | Medium | Top_100_Liked_Questions, String, Dynamic_Programming, Algorithm_II_Day_17_Dynamic_Programming, Dynamic_Programming_I_Day_19, Udemy_Dynamic_Programming, Big_O_Time_O(n*m)_Space_O(n*m) | 94 | 80.56 |
0763 | Partition Labels | Medium | Top_100_Liked_Questions, String, Hash_Table, Greedy, Two_Pointers, Data_Structure_II_Day_7_String, Big_O_Time_O(n)_Space_O(1) | 54 | 94.74 |
0739 | Daily Temperatures | Medium | Top_100_Liked_Questions, Array, Stack, Monotonic_Stack, Programming_Skills_II_Day_6, Big_O_Time_O(n)_Space_O(n) | 194 | 97.36 |
0647 | Palindromic Substrings | Medium | Top_100_Liked_Questions, String, Dynamic_Programming, Big_O_Time_O(n^2)_Space_O(n) | 60 | 89.76 |
0560 | Subarray Sum Equals K | Medium | Top_100_Liked_Questions, Array, Hash_Table, Prefix_Sum, Data_Structure_II_Day_5_Array, Big_O_Time_O(n)_Space_O(n) | 70 | 92.45 |
0543 | Diameter of Binary Tree | Easy | Top_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, Level_2_Day_7_Tree, Udemy_Tree_Stack_Queue, Big_O_Time_O(n)_Space_O(n) | 61 | 80.89 |
0494 | Target Sum | Medium | Top_100_Liked_Questions, Array, Dynamic_Programming, Backtracking, Big_O_Time_O(n*(sum+s))_Space_O(n*(sum+s)) | 77 | 81.99 |
0438 | Find All Anagrams in a String | Medium | Top_100_Liked_Questions, String, Hash_Table, Sliding_Window, Algorithm_II_Day_5_Sliding_Window, Programming_Skills_II_Day_12, Level_1_Day_12_Sliding_Window/Two_Pointer, Big_O_Time_O(n+m)_Space_O(1) | 69 | 96.69 |
0437 | Path Sum III | Medium | Top_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, Level_2_Day_7_Tree, Big_O_Time_O(n)_Space_O(n) | 68 | 86.71 |
0416 | Partition Equal Subset Sum | Medium | Top_100_Liked_Questions, Array, Dynamic_Programming, Level_2_Day_13_Dynamic_Programming, Big_O_Time_O(n*sums)_Space_O(n*sums) | 91 | 74.38 |
0394 | Decode String | Medium | Top_100_Liked_Questions, String, Stack, Recursion, Level_1_Day_14_Stack, Udemy_Strings, Big_O_Time_O(n)_Space_O(n) | 51 | 81.02 |
0347 | Top K Frequent Elements | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Sorting, Heap_Priority_Queue, Counting, Divide_and_Conquer, Quickselect, Bucket_Sort, Data_Structure_II_Day_20_Heap_Priority_Queue, Big_O_Time_O(n*log(n))_Space_O(k) | 62 | 87.48 |
0338 | Counting Bits | Easy | Top_100_Liked_Questions, Dynamic_Programming, Bit_Manipulation, Udemy_Bit_Manipulation, Big_O_Time_O(num)_Space_O(num) | 69 | 86.81 |
0322 | Coin Change | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Breadth_First_Search, Algorithm_II_Day_18_Dynamic_Programming, Dynamic_Programming_I_Day_20, Level_2_Day_12_Dynamic_Programming, Big_O_Time_O(m*n)_Space_O(amount) | 85 | 86.14 |
0300 | Longest Increasing Subsequence | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Binary_Search, Algorithm_II_Day_16_Dynamic_Programming, Binary_Search_II_Day_3, Dynamic_Programming_I_Day_18, Udemy_Dynamic_Programming, Big_O_Time_O(n*log_n)_Space_O(n) | 57 | 93.75 |
0295 | Find Median from Data Stream | Hard | Top_100_Liked_Questions, Top_Interview_Questions, Sorting, Two_Pointers, Design, Heap_Priority_Queue, Data_Stream, Big_O_Time_O(n*log_n)_Space_O(n) | 335 | 99.44 |
0287 | Find the Duplicate Number | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Two_Pointers, Bit_Manipulation, Binary_Search_II_Day_5, Big_O_Time_O(n)_Space_O(n) | 60 | 98.11 |
0283 | Move Zeroes | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Array, Two_Pointers, Algorithm_I_Day_3_Two_Pointers, Programming_Skills_I_Day_6_Array, Udemy_Arrays, Big_O_Time_O(n)_Space_O(1) | 71 | 91.63 |
0240 | Search a 2D Matrix II | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Matrix, Divide_and_Conquer, Data_Structure_II_Day_4_Array, Binary_Search_II_Day_8, Big_O_Time_O(n+m)_Space_O(1) | 58 | 64.44 |
0239 | Sliding Window Maximum | Hard | Top_100_Liked_Questions, Top_Interview_Questions, Array, Heap_Priority_Queue, Sliding_Window, Queue, Monotonic_Queue, Udemy_Arrays, Big_O_Time_O(n*k)_Space_O(n+k) | 216 | 99.50 |
0238 | Product of Array Except Self | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Prefix_Sum, Data_Structure_II_Day_5_Array, Udemy_Arrays, Big_O_Time_O(n^2)_Space_O(n) | 89 | 64.48 |
0236 | Lowest Common Ancestor of a Binary Tree | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Tree, Binary_Tree, Data_Structure_II_Day_18_Tree, Udemy_Tree_Stack_Queue, Big_O_Time_O(n)_Space_O(n) | 59 | 96.11 |
0234 | Palindrome Linked List | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Two_Pointers, Stack, Linked_List, Recursion, Level_2_Day_3_Linked_List, Udemy_Linked_List, Big_O_Time_O(n)_Space_O(1) | 96 | 95.67 |
0230 | Kth Smallest Element in a BST | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Tree, Binary_Tree, Binary_Search_Tree, Data_Structure_II_Day_17_Tree, Level_2_Day_9_Binary_Search_Tree, Big_O_Time_O(n)_Space_O(n) | 54 | 97.22 |
0226 | Invert Binary Tree | Easy | Top_100_Liked_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Data_Structure_I_Day_12_Tree, Level_2_Day_6_Tree, Udemy_Tree_Stack_Queue, Big_O_Time_O(n)_Space_O(n) | 52 | 81.65 |
0221 | Maximal Square | Medium | Top_100_Liked_Questions, Array, Dynamic_Programming, Matrix, Dynamic_Programming_I_Day_16, Big_O_Time_O(m*n)_Space_O(m*n) | 83 | 79.70 |
0215 | Kth Largest Element in an Array | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Heap_Priority_Queue, Divide_and_Conquer, Quickselect, Data_Structure_II_Day_20_Heap_Priority_Queue, Big_O_Time_O(n*log(n))_Space_O(log(n)) | 148 | 54.45 |
0208 | Implement Trie (Prefix Tree) | Medium | Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Design, Trie, Level_2_Day_16_Design, Udemy_Trie_and_Heap, Big_O_Time_O(word.length())_or_O(prefix.length())_Space_O(N) | 168 | 80.99 |
0207 | Course Schedule | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Breadth_First_Search, Graph, Topological_Sort, Big_O_Time_O(N)_Space_O(N) | 68 | 70.14 |
0206 | Reverse Linked List | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Linked_List, Recursion, Data_Structure_I_Day_8_Linked_List, Algorithm_I_Day_10_Recursion_Backtracking, Level_1_Day_3_Linked_List, Udemy_Linked_List, Big_O_Time_O(N)_Space_O(1) | 51 | 92.87 |
0200 | Number of Islands | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Depth_First_Search, Breadth_First_Search, Matrix, Union_Find, Algorithm_II_Day_6_Breadth_First_Search_Depth_First_Search, Graph_Theory_I_Day_1_Matrix_Related_Problems, Level_1_Day_9_Graph/BFS/DFS, Udemy_Graph, Big_O_Time_O(M*N)_Space_O(M*N) | 61 | 96.71 |
0198 | House Robber | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Algorithm_I_Day_12_Dynamic_Programming, Dynamic_Programming_I_Day_3, Level_2_Day_12_Dynamic_Programming, Udemy_Dynamic_Programming, Big_O_Time_O(n)_Space_O(n) | 51 | 77.29 |
0189 | Rotate Array | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Math, Two_Pointers, Algorithm_I_Day_2_Two_Pointers, Udemy_Arrays, Big_O_Time_O(n)_Space_O(1) | 75 | 97.25 |
0169 | Majority Element | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Sorting, Counting, Divide_and_Conquer, Data_Structure_II_Day_1_Array, Udemy_Famous_Algorithm, Big_O_Time_O(n)_Space_O(1) | 50 | 96.16 |
0160 | Intersection of Two Linked Lists | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Hash_Table, Two_Pointers, Linked_List, Data_Structure_II_Day_11_Linked_List, Udemy_Linked_List, Big_O_Time_O(M+N)_Space_O(1) | 67 | 93.58 |
0155 | Min Stack | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Stack, Design, Data_Structure_II_Day_14_Stack_Queue, Programming_Skills_II_Day_18, Level_2_Day_16_Design, Udemy_Design, Big_O_Time_O(1)_Space_O(N) | 84 | 92.72 |
0153 | Find Minimum in Rotated Sorted Array | Medium | Top_100_Liked_Questions, Array, Binary_Search, Algorithm_II_Day_2_Binary_Search, Binary_Search_I_Day_12, Udemy_Binary_Search, Big_O_Time_O(log_N)_Space_O(log_N) | 42 | 98.87 |
0152 | Maximum Product Subarray | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Dynamic_Programming_I_Day_6, Level_2_Day_13_Dynamic_Programming, Udemy_Dynamic_Programming, Big_O_Time_O(N)_Space_O(1) | 53 | 87.50 |
0148 | Sort List | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Sorting, Two_Pointers, Linked_List, Divide_and_Conquer, Merge_Sort, Level_2_Day_4_Linked_List, Big_O_Time_O(log(N))_Space_O(log(N)) | 141 | 97.14 |
0146 | LRU Cache | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Hash_Table, Design, Linked_List, Doubly_Linked_List, Udemy_Linked_List, Big_O_Time_O(1)_Space_O(capacity) | 473 | 94.72 |
0142 | Linked List Cycle II | Medium | Top_100_Liked_Questions, Hash_Table, Two_Pointers, Linked_List, Data_Structure_II_Day_10_Linked_List, Level_1_Day_4_Linked_List, Udemy_Linked_List, Big_O_Time_O(N)_Space_O(1) | 59 | 94.39 |
0141 | Linked List Cycle | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Hash_Table, Two_Pointers, Linked_List, Data_Structure_I_Day_7_Linked_List, Udemy_Linked_List, Big_O_Time_O(N)_Space_O(1) | 59 | 93.37 |
0139 | Word Break | Medium | Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Dynamic_Programming, Trie, Memoization, Algorithm_II_Day_15_Dynamic_Programming, Dynamic_Programming_I_Day_9, Udemy_Dynamic_Programming, Big_O_Time_O(M+max*N)_Space_O(M+N+max) | 56 | 88.44 |
0138 | Copy List with Random Pointer | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Hash_Table, Linked_List, Programming_Skills_II_Day_14, Udemy_Linked_List, Big_O_Time_O(N)_Space_O(N) | 52 | 88.27 |
0136 | Single Number | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Array, Bit_Manipulation, Data_Structure_II_Day_1_Array, Algorithm_I_Day_14_Bit_Manipulation, Udemy_Integers, Big_O_Time_O(N)_Space_O(1) | 56 | 85.48 |
0131 | Palindrome Partitioning | Medium | Top_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Backtracking, Big_O_Time_O(N*2^N)_Space_O(2^N*N) | 203 | 99.22 |
0128 | Longest Consecutive Sequence | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Union_Find, Big_O_Time_O(N_log_N)_Space_O(1) | 92 | 93.69 |
0124 | Binary Tree Maximum Path Sum | Hard | Top_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Depth_First_Search, Tree, Binary_Tree, Udemy_Tree_Stack_Queue, Big_O_Time_O(N)_Space_O(N) | 61 | 96.73 |
0121 | Best Time to Buy and Sell Stock | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Data_Structure_I_Day_3_Array, Dynamic_Programming_I_Day_7, Level_1_Day_5_Greedy, Udemy_Arrays, Big_O_Time_O(N)_Space_O(1) | 56 | 99.56 |
0114 | Flatten Binary Tree to Linked List | Medium | Top_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, Stack, Linked_List, Udemy_Linked_List, Big_O_Time_O(N)_Space_O(N) | 55 | 90.66 |
0105 | Construct Binary Tree from Preorder and Inorder Traversal | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Tree, Binary_Tree, Divide_and_Conquer, Data_Structure_II_Day_15_Tree, Big_O_Time_O(N)_Space_O(N) | 65 | 96.47 |
0104 | Maximum Depth of Binary Tree | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Data_Structure_I_Day_11_Tree, Programming_Skills_I_Day_10_Linked_List_and_Tree, Udemy_Tree_Stack_Queue, Big_O_Time_O(N)_Space_O(H) | 51 | 97.14 |
0102 | Binary Tree Level Order Traversal | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Breadth_First_Search, Tree, Binary_Tree, Data_Structure_I_Day_11_Tree, Level_1_Day_6_Tree, Udemy_Tree_Stack_Queue, Big_O_Time_O(N)_Space_O(N) | 60 | 97.47 |
0101 | Symmetric Tree | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Data_Structure_I_Day_11_Tree, Level_2_Day_15_Tree, Big_O_Time_O(N)_Space_O(log(N)) | 49 | 98.54 |
0098 | Validate Binary Search Tree | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Tree, Binary_Tree, Binary_Search_Tree, Data_Structure_I_Day_14_Tree, Level_1_Day_8_Binary_Search_Tree, Udemy_Tree_Stack_Queue, Big_O_Time_O(N)_Space_O(log(N)) | 51 | 98.35 |
0096 | Unique Binary Search Trees | Medium | Top_100_Liked_Questions, Dynamic_Programming, Math, Tree, Binary_Tree, Binary_Search_Tree, Dynamic_Programming_I_Day_11, Big_O_Time_O(n)_Space_O(1) | 45 | 96.00 |
0094 | Binary Tree Inorder Traversal | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Tree, Binary_Tree, Stack, Data_Structure_I_Day_10_Tree, Udemy_Tree_Stack_Queue, Big_O_Time_O(n)_Space_O(n) | 45 | 97.30 |
0084 | Largest Rectangle in Histogram | Hard | Top_100_Liked_Questions, Top_Interview_Questions, Array, Stack, Monotonic_Stack, Big_O_Time_O(n_log_n)_Space_O(log_n) | 78 | 92.44 |
0079 | Word Search | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Matrix, Backtracking, Algorithm_II_Day_11_Recursion_Backtracking, Big_O_Time_O(4^(m*n))_Space_O(m*n) | 327 | 95.78 |
0078 | Subsets | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Bit_Manipulation, Backtracking, Algorithm_II_Day_9_Recursion_Backtracking, Udemy_Backtracking/Recursion, Big_O_Time_O(2^n)_Space_O(n*2^n) | 50 | 94.61 |
0076 | Minimum Window Substring | Hard | Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Sliding_Window, Level_2_Day_14_Sliding_Window/Two_Pointer, Big_O_Time_O(s.length())_Space_O(1) | 82 | 82.17 |
0075 | Sort Colors | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Two_Pointers, Data_Structure_II_Day_2_Array, Udemy_Arrays, Big_O_Time_O(n)_Space_O(1) | 43 | 97.41 |
0074 | Search a 2D Matrix | Medium | Top_100_Liked_Questions, Array, Binary_Search, Matrix, Data_Structure_I_Day_5_Array, Algorithm_II_Day_1_Binary_Search, Binary_Search_I_Day_8, Level_2_Day_8_Binary_Search, Udemy_2D_Arrays/Matrix, Big_O_Time_O(endRow+endCol)_Space_O(1) | 45 | 96.82 |
0073 | Set Matrix Zeroes | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Matrix, Udemy_2D_Arrays/Matrix, Big_O_Time_O(m*n)_Space_O(1) | 61 | 97.66 |
0072 | Edit Distance | Hard | Top_100_Liked_Questions, String, Dynamic_Programming, Algorithm_II_Day_18_Dynamic_Programming, Dynamic_Programming_I_Day_19, Udemy_Dynamic_Programming, Big_O_Time_O(n^2)_Space_O(n2) | 68 | 95.20 |
0070 | Climbing Stairs | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Math, Memoization, Algorithm_I_Day_12_Dynamic_Programming, Dynamic_Programming_I_Day_2, Level_1_Day_10_Dynamic_Programming, Udemy_Dynamic_Programming, Big_O_Time_O(n)_Space_O(n) | 44 | 94.58 |
0064 | Minimum Path Sum | Medium | Top_100_Liked_Questions, Array, Dynamic_Programming, Matrix, Dynamic_Programming_I_Day_16, Udemy_Dynamic_Programming, Big_O_Time_O(m*n)_Space_O(m*n) | 48 | 99.67 |
0062 | Unique Paths | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Math, Combinatorics, Algorithm_II_Day_13_Dynamic_Programming, Dynamic_Programming_I_Day_15, Level_1_Day_11_Dynamic_Programming, Big_O_Time_O(m*n)_Space_O(m*n) | 40 | 98.97 |
0056 | Merge Intervals | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Data_Structure_II_Day_2_Array, Level_2_Day_17_Interval, Udemy_2D_Arrays/Matrix, Big_O_Time_O(n_log_n)_Space_O(n) | 84 | 92.06 |
0055 | Jump Game | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Greedy, Algorithm_II_Day_12_Dynamic_Programming, Dynamic_Programming_I_Day_4, Udemy_Arrays, Big_O_Time_O(n)_Space_O(1) | 58 | 91.95 |
0053 | Maximum Subarray | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Divide_and_Conquer, Data_Structure_I_Day_1_Array, Dynamic_Programming_I_Day_5, Udemy_Famous_Algorithm, Big_O_Time_O(n)_Space_O(1) | 66 | 90.36 |
0051 | N-Queens | Hard | Top_100_Liked_Questions, Array, Backtracking, Big_O_Time_O(N!)_Space_O(N) | 57 | 93.84 |
0049 | Group Anagrams | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, String, Hash_Table, Sorting, Data_Structure_II_Day_8_String, Programming_Skills_II_Day_11, Udemy_Strings, Big_O_Time_O(n*k_log_k)_Space_O(n) | 93 | 97.29 |
0048 | Rotate Image | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Math, Matrix, Data_Structure_II_Day_3_Array, Programming_Skills_II_Day_7, Udemy_2D_Arrays/Matrix, Big_O_Time_O(n^2)_Space_O(1) | 45 | 95.31 |
0046 | Permutations | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Backtracking, Algorithm_I_Day_11_Recursion_Backtracking, Level_2_Day_20_Brute_Force/Backtracking, Udemy_Backtracking/Recursion, Big_O_Time_O(n*n!)_Space_O(n+n!) | 56 | 96.26 |
0045 | Jump Game II | Medium | Top_100_Liked_Questions, Array, Dynamic_Programming, Greedy, Algorithm_II_Day_13_Dynamic_Programming, Dynamic_Programming_I_Day_4, Big_O_Time_O(n)_Space_O(1) | 50 | 95.93 |
0042 | Trapping Rain Water | Hard | Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Two_Pointers, Stack, Monotonic_Stack, Dynamic_Programming_I_Day_9, Udemy_Two_Pointers, Big_O_Time_O(n)_Space_O(1) | 46 | 99.52 |
0041 | First Missing Positive | Hard | Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Udemy_Arrays, Big_O_Time_O(n)_Space_O(n) | 55 | 98.51 |
0039 | Combination Sum | Medium | Top_100_Liked_Questions, Array, Backtracking, Algorithm_II_Day_10_Recursion_Backtracking, Level_2_Day_20_Brute_Force/Backtracking, Udemy_Backtracking/Recursion, Big_O_Time_O(2^n)_Space_O(n+2^n) | 65 | 86.86 |
0035 | Search Insert Position | Easy | Top_100_Liked_Questions, Array, Binary_Search, Algorithm_I_Day_1_Binary_Search, Binary_Search_I_Day_2, Big_O_Time_O(log_n)_Space_O(1) | 51 | 80.95 |
0034 | Find First and Last Position of Element in Sorted Array | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Algorithm_II_Day_1_Binary_Search, Binary_Search_I_Day_5, Big_O_Time_O(log_n)_Space_O(1) | 45 | 98.05 |
0033 | Search in Rotated Sorted Array | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Algorithm_II_Day_1_Binary_Search, Binary_Search_I_Day_11, Level_2_Day_8_Binary_Search, Udemy_Binary_Search, Big_O_Time_O(log_n)_Space_O(1) | 43 | 98.54 |
0032 | Longest Valid Parentheses | Hard | Top_100_Liked_Questions, String, Dynamic_Programming, Stack, Big_O_Time_O(n)_Space_O(1) | 56 | 89.31 |
0031 | Next Permutation | Medium | Top_100_Liked_Questions, Array, Two_Pointers, Big_O_Time_O(n)_Space_O(1) | 47 | 99.30 |
0025 | Reverse Nodes in k-Group | Hard | Top_100_Liked_Questions, Linked_List, Recursion, Data_Structure_II_Day_13_Linked_List, Udemy_Linked_List, Big_O_Time_O(n)_Space_O(k) | 74 | 66.83 |
0024 | Swap Nodes in Pairs | Medium | Top_100_Liked_Questions, Linked_List, Recursion, Data_Structure_II_Day_12_Linked_List, Udemy_Linked_List, Big_O_Time_O(n)_Space_O(1) | 59 | 62.67 |
0023 | Merge k Sorted Lists | Hard | Top_100_Liked_Questions, Top_Interview_Questions, Heap_Priority_Queue, Linked_List, Divide_and_Conquer, Merge_Sort, Big_O_Time_O(k*n*log(k))_Space_O(log(k)) | 76 | 94.52 |
0022 | Generate Parentheses | Medium | Top_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Backtracking, Algorithm_II_Day_11_Recursion_Backtracking, Udemy_Backtracking/Recursion, Big_O_Time_O(2^n)_Space_O(n) | 60 | 62.03 |
0021 | Merge Two Sorted Lists | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Linked_List, Recursion, Data_Structure_I_Day_7_Linked_List, Algorithm_I_Day_10_Recursion_Backtracking, Level_1_Day_3_Linked_List, Udemy_Linked_List, Big_O_Time_O(m+n)_Space_O(m+n) | 59 | 86.77 |
0020 | Valid Parentheses | Easy | Top_100_Liked_Questions, Top_Interview_Questions, String, Stack, Data_Structure_I_Day_9_Stack_Queue, Udemy_Strings, Big_O_Time_O(n)_Space_O(n) | 50 | 95.90 |
0019 | Remove Nth Node From End of List | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Two_Pointers, Linked_List, Algorithm_I_Day_5_Two_Pointers, Level_2_Day_3_Linked_List, Big_O_Time_O(L)_Space_O(L) | 54 | 87.87 |
0017 | Letter Combinations of a Phone Number | Medium | Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Backtracking, Algorithm_II_Day_11_Recursion_Backtracking, Udemy_Backtracking/Recursion, Big_O_Time_O(4^n)_Space_O(n) | 52 | 79.11 |
0015 | 3Sum | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Two_Pointers, Data_Structure_II_Day_1_Array, Algorithm_II_Day_3_Two_Pointers, Udemy_Two_Pointers, Big_O_Time_O(n*log(n))_Space_O(n^2) | 148 | 92.62 |
0011 | Container With Most Water | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Greedy, Two_Pointers, Algorithm_II_Day_4_Two_Pointers, Big_O_Time_O(n)_Space_O(1) | 57 | 98.23 |
0010 | Regular Expression Matching | Hard | Top_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Recursion, Udemy_Dynamic_Programming, Big_O_Time_O(m*n)_Space_O(m*n) | 69 | 92.65 |
0009 | Palindrome Number | Easy | Math, Udemy_Integers | 137 | 88.64 |
0008 | String to Integer (atoi) | Medium | Top_Interview_Questions, String | 56 | 99.01 |
0007 | Reverse Integer | Medium | Top_Interview_Questions, Math, Udemy_Integers | 56 | 95.68 |
0006 | Zigzag Conversion | Medium | String | 64 | 95.38 |
0005 | Longest Palindromic Substring | Medium | Top_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Data_Structure_II_Day_9_String, Algorithm_II_Day_14_Dynamic_Programming, Dynamic_Programming_I_Day_17, Udemy_Strings, Big_O_Time_O(n)_Space_O(n) | 68 | 95.34 |
0004 | Median of Two Sorted Arrays | Hard | Top_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Divide_and_Conquer, Big_O_Time_O(log(min(N,M)))_Space_O(1) | 86 | 92.15 |
0003 | Longest Substring Without Repeating Characters | Medium | Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Sliding_Window, Algorithm_I_Day_6_Sliding_Window, Level_2_Day_14_Sliding_Window/Two_Pointer, Udemy_Strings, Big_O_Time_O(n)_Space_O(1) | 65 | 90.77 |
0002 | Add Two Numbers | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Math, Linked_List, Recursion, Data_Structure_II_Day_10_Linked_List, Programming_Skills_II_Day_15, Big_O_Time_O(max(N,M))_Space_O(max(N,M)) | 92 | 77.86 |
0001 | Two Sum | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Data_Structure_I_Day_2_Array, Level_1_Day_13_Hashmap, Udemy_Arrays, Big_O_Time_O(n)_Space_O(n) | 54 | 91.72 |
Contributing
Your ideas/fixes/algorithms are more than welcome!
- Fork this repo
- Clone your forked repo (
git clone https://github.com/YOUR_GITHUB_USERNAME/LeetCode-in-TypeScript.git
) onto your local machine -
cd
into your cloned directory, create your feature branch (git checkout -b my-awesome-fix
) -
git add
your desired changes to this repo - Commit your changes (
git commit -m 'Added some awesome features/fixes'
) - Push to the branch (
git push origin my-awesome-feature
) - Open your forked repo on Github website, create a new Pull Request to this repo!